I have been writing a lot about Trump's tariffs in the past few weeks, whether it is the auto tariffs, the so-called "reciprocal" tariffs, or the incoherent "logic" of the tariffs. I need a break from tariffs and write about a topic that has been sitting in my backlog for a while: overpopulation. Since the early 19th century, the global population has grown from 1 billion people to over 8 people. The United Nations estimates that the planet will reach its peak around the end of century with about 10.4 billion people. The concern that summarizes the overpopulation debate is whether the global human population is exceeding Planet Earth's ability to sustain everyone while causing ecological and social consequences along the way.
This debate dates back to Thomas Malthus, who predicted that the global population would outstrip food production to the point of causing global famine. It looks like Malthus posthumously has egg on his face, pun intended. According to the U.S. Department of Agriculture, the global population doubled in the past six decades while global agricultural production increased by nearly four-fold in that same time period. As Oxford brings up, much of that productivity was due to using technology to increase the yield output, which has dramatically reduced arable land use on a per capita basis. The famous Simon-Ehrlich wager was another example of how the resource scarcity argument was challenged. This bet eventually led to the Simon Abundance Index, which shows that we as a species are 509.4 percent more abundant now than we were in 1980.
I do find the argument that technological development and human creativity can help us through natural resources management to be a compelling one because it is not based on a static model or zero-sum thinking. I find the technological progress in the agricultural sector to be on a good enough trajectory where I do not have too many worries. That does not mean I do not have any concerns about resources on the planet.
The big one that draws my attention has to do with water. I first brought up the concern about water management in 2014, specifically with regards to water subsidies artificially increasing the demand of water to the point of people running out of water. If we, as a species, do not find a way to manage water efficiently, I fear that there will be wars over water in a way that there have been wars over oil in the past. Then there's matter of deforestation. While there is some reforestation going on, the net global trend is that humans are responsible for up to 10 million hectares of forest, which is the size of Portugal for context. Conversely, the regions with reforestation are the ones with greater economic development and freedom. Even with fracking, there is only a limited supply of fossil fuels that exist. Goldman Sachs predicts that we will not reach peak oil for another decade.
Then there is the matter of infrastructure strain. There is a strained housing supply and increased homelessness in much of the world, but I first and foremost put the blame on land use regulations, rent control, and other government regulations that artificially restrict housing supply. Whether schools, hospitals, and transportation systems can handle the population growth is up for debate, as well. Keep in mind that the population growth is projected to happen in developing countries where these strains are most likely to be felt. The bigger issue with developed countries is going to be the lower birth rates. Why? Because as the population is aging, there will be greater economic and social challenges. One of those there will be fewer young people in the workforce to support older people, especially when it comes to retirement accounts such as Social Security.
There are challenges to be had, regardless of whether there is a population increase or a population decline. I do not find myself unequivocally on one side or the other. As has been the case in the past, I do find that technological development will be a major component in the years ahead. I do think that it comes down to what progress comes out and how governments across the world respond. China's One Child Policy was a nightmare with unintended consequences, so maybe forced sterilization and coerced population control is not the way to go.
Unsurprisingly, I am going to argue that the greater that red tape, regulations, and government programs can be reduced in size, the better we can handle the effects, whether it is reaching the population peak later this century or the countries that have or are going to see a decline in their populations due to declining birth rates. I do hope that ingenuity and technological progress triumph over the age-old economic question of how to manage resource scarcity, but time will tell.